bool SlideEventHandler::nextLayer()
{
LayerAttributes* la = (_slideSwitch.valid() && _activeLayer<static_cast<int>(_slideSwitch->getNumChildren())) ? dynamic_cast<LayerAttributes*>(_slideSwitch->getChild(_activeLayer)->getUserData()) : 0;
if (la)
{
la->callLeaveCallbacks(_slideSwitch->getChild(_activeLayer));
if (la->requiresJump())
{
if (la->getRelativeJump())
{
int previousSlide = getActiveSlide();
int previousLayer = getActiveLayer();
int newSlide = previousSlide + la->getSlideNum();
int newLayer = previousLayer + la->getLayerNum();
if (newLayer<0)
{
newLayer = 0;
}
return selectSlide(newSlide, newLayer);
}
else
{
return selectSlide(la->getSlideNum(),la->getLayerNum());
}
}
}
OSG_INFO<<"nextLayer() calling selectLayer("<<_activeLayer+1<<")"<<std::endl;
return selectLayer(_activeLayer+1);
}
bool SlideEventHandler::nextSlide()
{
OSG_INFO<<"nextSlide()"<<std::endl;
LayerAttributes* la = _slideSwitch.valid() ? dynamic_cast<LayerAttributes*>(_slideSwitch->getUserData()) : 0;
if (la && la->requiresJump())
{
if (la->getRelativeJump())
{
int previousSlide = getActiveSlide();
int previousLayer = getActiveLayer();
int newSlide = previousSlide + la->getSlideNum();
int newLayer = previousLayer + la->getLayerNum();
if (newLayer<0)
{
newLayer = 0;
}
return selectSlide(newSlide, newLayer);
}
else
{
return selectSlide(la->getSlideNum(),la->getLayerNum());
}
}
if (selectSlide(_activeSlide+1)) return true;
else if (_loopPresentation) return selectSlide(0);
else return false;
}
